Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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Which of the following is NOT a major volcanic area?
a. | boundaries of tectonic plates | c. | central continental
plains | b. | mid-ocean ridges | d. | subduction zones |
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2.
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This area is both a major earthquake zone and volcano zone.
a. | Pacific Ring of Volcanoes | c. | Oceanic Ring of
Fire | b. | Pacific Ring of Fire | d. | Pacific Island Arc |
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3.
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Which of the following does NOT signal a volcanic eruption?
a. | increase in thunderstorms near the volcano | b. | changes in
earthquake activity | c. | bulging of volcano surface | d. | changes in the
amount and composition of volcanic gases |
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4.
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Magma that is rich in magnesium and iron is called
a. | pyroclastic. | c. | composite. | b. | mafic. | d. | felsic. |
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5.
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Magma that is rich in feldspar and silica is called
a. | pyroclastic. | c. | composite. | b. | mafic. | d. | felsic. |
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6.
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Composite volcanoes are also known as
a. | stratovolcanoes. | c. | craters. | b. | cinder cones. | d. | shield
volcanoes. |
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7.
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When the temperature of rock rises above its melting point,
a. | magma will form. | c. | magma will not form. | b. | the melting point will
increase. | d. | the melting point
will decrease. |
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8.
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Volcanic ash, dust, blocks, bombs, and lapilli are all
a. | felsic lava. | c. | mafic lava. | b. | pyroclastic materials. | d. | pahoehoe. |
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9.
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Which of the following is NOT a major volcano cone type?
a. | cinder cone | c. | shield | b. | composite | d. | mantle plume |
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10.
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The eruption of Mount St. Helens was
a. | an oceanic volcano. | c. | an explosive eruption. | b. | a quiet
eruption. | d. | a
stratovolcano. |
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11.
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Which of the following is NOT a tectonic setting where volcanoes form?
a. | boundaries of tectonic plates | c. | mid-ocean
ridges | b. | glacier-formed crater lakes | d. | subduction zones |
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12.
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Any activity that includes the movement of magna to Earth’s surface is
called
a. | a vent. | c. | volcanism. | b. | a volcano. | d. | lava. |
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13.
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The three primary tectonic settings are zones near convergent and divergent
tectonic plates, subduction zones, and
a. | mid-ocean ridges. | c. | oceanic plates. | b. | island arcs. | d. | trench zones. |
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14.
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A large circular depression that forms when the magma chamber below a volcano
partially empties, causing the ground above it to sink, is called a
a. | crater. | c. | cone. | b. | caldera. | d. | crust. |
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15.
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When lava cools rapidly, a crust forms on the surface of the flow. If the flow
continues, the crust wrinkles and forms volcanic rock known as
a. | aa. | c. | blocky lava. | b. | pahoehoe. | d. | lapilli. |
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16.
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Rapidly cooled lava that forms on underwater volcanoes at a mid-ocean ridge is
called
a. | plume lava. | c. | pillow lava. | b. | felsic lava. | d. | mafic lava. |
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17.
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An area of volcanic activity far from a tectonic plate boundary is called
a(n)
a. | hot spot. | c. | island arc. | b. | cone. | d. | mantle plume. |
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18.
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Large plutons that can cover an area as large as 100 km2 are
called
a. | dikes. | c. | batholiths. | b. | necks. | d. | igneous. |
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Short Answer; PICK 2 of the 7 questions to Answer. ANSWER ONLY 2.
Worth 2 pts each.
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19.
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Explain how igneous rock forms.
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20.
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How are most island volcanoes, such as those in Hawaii, formed?
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21.
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How does blocky lava differ from aa and pahoehoe?
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22.
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How is a crater formed?
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23.
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When an ocean plate and a continental plate collide, which is apt to subduct?
Why?
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24.
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Explain how the composition of magma affects volcanic eruptions and the flow of
lava.
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25.
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List the five major types of pyroclastic material, in order of size, from
smallest to largest.
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Essay; PICK ONLY 2 QUESTIONS to answer. Worth 4 pts extra credit
each. REMEMBER, THIS IS AN ESSAY! Write in complete sentences for full credit.
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26.
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You are exploring a dormant volcano. As you walk, you first notice volcanic ash.
As you continue in the same direction, you find pieces of lapilli. Are you more likely to be walking
toward or away from the volcano? Explain your answer.
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27.
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Explain how each of the three major types of volcanic cones are formed.
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28.
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Scientists have studied the behavior of volcanoes in an effort to better predict
the warning signs prior to an eruption. Given this information, will human life ever be totally
protected from the risks associated with volcanic activity? Explain your answer.
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29.
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Given what you have learned about the development of volcanoes, what role do you
think they have played in forming landmasses on Earth? Explain your answer.
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